A nice collection of abstracts!  I must say ... yours is the best one there.  I'm not saying that because you're on RR, either.  It's just so elegant and the light is just right.  The only other image that touches it is the yellow paper.  An equally elegant composition.  When I scrolled down through the 25 images I saw things I liked, and I was thinking, "well, I'll see some nice thing Geert did."  When I found yours, it stopped me cold!  A most excellent image.

Congratulations! 

 

"If your pictures aren't good enough, you're not close enough."  ...  Robert Capa